US1469755A - Grinding mechanism for the shear blades of tuft-fabric looms - Google Patents

Description

Dot. 2 1923.

v E. F. HATHAWAY GRINDING MECHANISM FOR THE SHEAR BLADES OF TUFT FABRIC LOOMS Filed May 1, 1 922 4 Sheets-Sheet 1 Get. 2 1923.

E. F. HATHAWAY GRINDING MECHANISM FOR THE SHEAR BLADES OF TUFT FABRIC LOOMS Filed May 1, 1922 4 Sheets-Sheet 2 Get. 2 1923. 7 1,469,755 E. F. HATHAWAY enmnme mncmmsm FOR THE SHEAR BLADES OF TUF'I" FABRIC Looms Ei'lgad May 1, 1922 4 Sheets-Sheet 3 oxg s Oct. 2

E. F. HATHAWAY GRINDING MECHANISM FOR THE SHEAR BLADES OF TUET FABRIC LOOMS Filed Mag 1, 1922 4 Sheets-Sheet;-

. EDGAR Fl HATHAWAY, "or 'wfitnnsnny,,MessAcHUsEuiirsj Assienoniiro,lsHAwiitU'ii' 1 ENGINEERINGQCOMPANY, onnoncnnsrnn,innsseennsn rcrsge conronlijtr'ro AssAcH sETTs.

i eammmmbmmsm reamasama LAnEs be e ranged "Leon s.

Application filed maylf 1, ;192:2. Ser ia1 in. 657,795" I 7 .To all whom it may concern: 3

specifi'cation like characters on the draw- 7 mgs representing-likeparts. I

, .Be it known that I,EDGAR F. HATHAVWAIVY,

a citizen of the 'United States, and a resi dent of VVellesley, in the county of Norfolk and State of Massachusetts, have'invented' an Improvement in Grinding Mechanism for the Shear Blades ofTuft-Fabric Looms,'of which the following description, in connection with the accompanying drawings, isa

This invention relates to grindingmecha' nisni and particularl vto grinding mecha nism for the shearnhl 7 looms, and more especially. tosuch" mechanism so constructed and Operated as to Qef-l: feet the grinding operation without .remov ing the shear blades fromthe 100111.: a

" In order that the principleof theinven tion may be readily understood,l have dis closed a single embodiment thereof in the accompanying drawings, where1n+ i 4 Fig. 1 is an end elevation of the selected:

, embodiment of my inventioni'(with parts of the loom in section) as applied for grind. ,ing theswingi-ng knife; I

2 is a transverse sectionthrough the grinding shaft, the grinding 'wheel*loeingf embodiment of myinventiom;theisliding' :nife having been removedan'd t-he gIlIldlIlg.

"side source ofpower; I

shown as acting on the sliding knife; 7

Fig.3 is a detail in. section of onefor-n'i of ineans for locking the shift rod that conof the grinding device between the: knives wheel being represented j as: operating upon the swinging knife.

T 5 is a plan viewwith'pa'rts broken;

away of the mechanism of the grinding .mechanism n positlonupon the loom;

, r I inn-'6 is a'view similar to Fig. 1 but rep-i resenting the mechanism as- 'ap-plied to knives wider spread'than those: SllOWIlflIl;

Fig. 1'; and

7 is a slde The knives of pile emanates, euchfior 3 example, as the two. knives extendingtrans versely of a'moquetteloom for severing the ends ofthe tuft yarnsjfrequire: frequent gririrling; So far as I am awaitegxit'hasla'lways been necessary to remove; the.kn1ves-'-.

; loom and; will grind textile machine, .and particularly 0f al'I'Il0f while in place in ades of tuft; fabricfijn the;disclosed embo diment of theinven,

supported upon the supports forlthe knives-j. I

. the i grinding?mechanism inay be automa-ti l.

'cally' controlled, being desirably autoina 'ment continuing until the :grinding :is'. efl bodilnent- (if-the inventionland will? describe 7 asmuchas Ibelieve. nyself toahethe firs V V 4 grindmor" sharpen the bl adeorbladesjof 'af pile-'fabi'icor other-loom ;without removing.:

.. saicl'lblade 'br hlades fr'om their position in 5,.the framing of the 10011 [mayheof an -aunti s 3e v shape, ancli'ri't is 5 provided. with supporting elevation representing thei grinding mechanism as "-dl'lVGII from an outusual or. any desired.Itype""s1nce 'myfi invent from the 100m to grind them.}and then to-re j place' them in the loom; This frequiresaa I loom bis, sofvcourse, "idler? gln accordance Tw-it h.v I

my inventiom-I have pfovided afgrinding,

mechanism which maybe. applied tohthejq [the -kn-iveskwhileigin' place in the loom.:.: ;An importantobjectof 'l my inventiom therefore; is tozprovideLmechE-Q quette ioripile 'f abrie 'l'oomu m -rbe ground the 106m. iDesirably and which is desirablyi suppoirtedilon"andguided by the knives themselves, though it may.

or. fnpon some othenj-zsui'tahle partnofthe loomriD esirabl and; in accogrdancewiththei disclosed embo imen-t of the rinvention th'er i" carriage is operated b-y aI-motoruponiit'he-- carriage or upon someother-siippo'rt, and if desiredand' as herein "shown the: travel;

cally reversed in its direction of g 'traveli-at'- eachfside of the looin,- the"t0 andfr'o'moive f fected." lghz'tue herein 7 a l ,s s' disclosed the preferred ems 7 the sameivvithontglimi ting myself thereto "Referring moreipar tic'u rl 't'o'F gs' to is indicated at It bars 2, '3, as shown in Figs; 1 and '2gforthe two lmives; 4. 5. {The path ofgthe y indicated in dottedilines 'in "Fi s, 1-

(in-grindingaor L v tion' 'pert-ains Qtoim ean' V V eVeEtheless'*-the s'liarpening'fthe kni .1 05 knivesenter into the coihhinationsof mechaa' f nism embodyingmy'invention injcrtamza' i pects of the; imenuo since;deS1nably-.:fthQi*5' "-ed as acting upon the knife 4: 'terined the Files. 1 and 2. The

knife or knives constitute a support for the grinding niechanisn An example of a tuft pile fabric or inoquette 10cm with whichiny inventioncis particularly adapted to be employed and also of the type of knife con'r. nionlyused upon such a looni'is shown in the patent to Hughes 1,363,790 dated Declearly'at'23 in 2.

shaft 2i carried for rotation in suitable ccinber 28, 1920; in the drawings of said patent swingingknife is indicated at 34! and a sliding and curved edge knife at 57*.

1 4- In 1 1g. 2, the grinding wheel is ieprcsent sliding knife, the knife 5 being termed the swinging knife, and in Fig. ithe grinding wheel is represented as operating upon the swinging knife. The knives 4i, 5 are positioned transversely of the loom, extending from side toside thereof, and their function is to sever the ends. ofthe tuft yarns that have been inserted in the shed, so that the ends of the. said tuft yarns may be even throughout the entire width of thefabric.

Theiconstant operation of the knives for this purpose rapidly dulls them, as has been al-, a5 7 ready stated.

} In order to grindtheknife 'or knives (while in position inthe looni. I desirably provide a movable supporter frarne for the grinder or grinding means, the same being shown in the disclosed einbodiinent of the invention as a traveling carriage, and for- *tl'llS purpose I have 1I1"tl18 several figures represented atraveling carriage at 9, ii; extendingtransversely of the 100m from side to side thereof and having mounted thereon the grindinghead ll, shown most clearly in said grinding head is herein shown as driven by spiral gears 12,

- clearly in Fig. 4 as secured to the grinding *niounted 'for adjustment in a segmental 13, also shown Inostclearly in said figures, the gear 13 being fast upon a shaft 14, which is mounted in a bearing 15, shown inost head. 11. The said shaft 14 is extended and is'coupled at 16 (see Fig-4i) to the shaft or spindle 17 of an electric or other 11101101. 18

, wh ch in this einbodiincnt of'the invention "is mounted upon the carriage 9, so asto re-' ciprocate therewith. Therefore inthis dis-r closure of my invention the entire inechae nisin may be termed self-contained. The a grinding" head 11 is preferably bearinirlQ forined'upon one face of the carriage 9,-the centre fLODl which the arc face of said segmentalbearings is struck being the axis of the shaftlh f Any suitable means may be provided to support the head 11 in adjustable position, so as to act upon the knife that'is tobe ground. .Hereinfor ,the purpose]. have represented the head 11' ashaving fiangges 20at= opposite edges whichv are slotted and through which 'n enibers21 rigid with the carriage 9 protrude. as, for example, cams22, indicated in Fig.

servin 1?.

' rears 3i, 3

rotate then i is controlled other of the 'QYOrlflG, for autoinatic reversalof Any suitable means,"

hearings in the grinding head 11 and the said shaft is double ended as indicated in Fig. 2, in order that another grinding wheel may be positioned thereon when the mechanism is to be used forgrinding the knife 5. liiother words the shaft 2% is adapted to receives-grinding wheel or men'iber each end act upon the knife positioned nearest suchend of the said shaft.

dri s the shaft 24L Herein for the purpose I employ the spiral gears already described and connections therefron to a source. of power: which-inay beborne upon the car riage or inay be eXtraneousl v supported.

The spindle or shaft" 14 is further provided :witha worin 25 indicated in dotted lines in Fig. Land meshing" with the worm wheel 26 fast upon one .end of a shaft 27. the said shaft having a bearing; 28 which is support edby. the bridge bar 29 shown niost clearly in'Fig lq f r e Secure upon the opposite end of the shaft abeveled gear 39 which engages oppositely positioned be eled gears 31 and 32 represented most clearly in Fi "ihe said beveled gears 31, 32 are provided with extended hubs which are iournaled in bearings Ilshown in Fig); 5; the flanges to prevent cndwise movement of the The hubs of said beveled gears 31.

the said beveled gears are foru'ied as sleeves, in whicl'iisrnoi nted for endwise movement a shaftfifi shown in Fi s 1, 2 and The said shaft 36 has above L gee-. 339 fast on one-end thereof. V v r .Slidably inount'ed upon the saidshal't '33 is a collar provided ateach end with clutch teeth 40 adapted to enslun'e corre sponding'teeth formed upon the beveled Tillie/clutch collar 39,;altbougl1 slidably mounted upon the shaft 36, is compelled to vith by reasonof key rotatcs iwith the pfoar 2-7- ion of, which latte. rccordinpg to theeu; utc'b colla with V 'd beveled gears-3], while and th or direction of the said csirahly 1 the direction from. near 38; and for this cleil table .nofthcsaid l tpurpose any 'in'ea'ns inay 'be providedi In the discloself embodiment of the invention t have reprewi'l' shown most clearly in Fizrf sented a for 2 as engaging a recess formed in the peripli} It isfast upon a said-shift ifod' 42'has terniinel' pertione'oi extensions 45, 46; which elite aieitpted tie en i'r y Of the clutch Collar r As fepre senteji" in Fig. .2,'the said clutch,cgfll ais extended upward and through Such extension passes a shift'rod 42shown aleo in Fig.5, the said shift rod "being'rigid withfitheffork 41 and having bearings 43,44,1where-ifi it mount-T ed'foiflong'itudinel sliding moveme t; -T-hegage 'abut'nients s'eeu'redftoPthe 'loem 'neer I gthe ends thereof. TOnj'offsaicl abiitm'ent's 'ie indicated at 474115 theleft iin Fig: 5,' and- I the "other abutment "is oppeeitely positioned" SO as to be engaged the extension or? v j ;I .ZI.: i

"When" the we 6611M eji sii hifted to engage one or the-other oflthe'beveled gears 31', 32, thes'hift'ro d 45inaybe-fercib1y held in its position to whieh 'ithas been nevedby engagement -with eitherend abutment-'47," ed 'as' to prevent disengagement of 'theec hltich fl cellar '39frem that beveled gear -v vithfwhich V aece np'lishingthis' endifiin'g43 isl'pi ovided"With'jan -e ension,4 s,;; in which the fsa'idshift "i-ro'd. 42' is 'slilehljr the shiftrod,

it has become engaged. Feithis ippi'peseany "suitable" means: f pi ovided. In

Fig; 3,'I have represented one n eensifer supported; Netehes "50; ar e 'ffermedf and they areffin ittiirn adapted to been'gagedby the pawloit tdothh5110'ngi- I tudin'a'llyelidable iii th'e extension"48, which this forms :t s'oeket." The 'saichtdoth o'f' p a w'i; is; yieldingly pressed a ainst the lshiitt red, 42 by the spiing '52; 2} (ea-p 53 'fei-Ining a n' abutment fof the,s pfrim; as Well: as} a guide fonthe stem 54 efthe "saidjmwl- 'foiteeth means may {be employed. Y

.diselosed embodiment 'of the -invienti'enwith a" beveled ge-a'i E5: :is feet; upon neend V V v Fig: 4) ,{the :szyidhaf being jeu'r'na'led "in em suitable bearing 571"- frigidlymeu-ntegl- =v5l.;; Desimbly provide eg ainst r'otatien ef "the teeth-er pawlfil as;by"forming'theetenithereof square in Cross 'Section; but any eth er It will be evident'that the' 'te'oth er pzi'wl In order to 'efiect"the 'reeiijroeationlora-fteij Show the} an difro trayelof "the grinding head i i ga gem'ent 0v me damages) andfh eld a sproeket chain carriage 9' will inthe disclosed embe'diment:

"effthe 1 invention be mqv'ed lengthwiee the "knife or k'nives am v thle direetidn' Wi11 'be re f versed its "the 'shift '10d engages. the respective' abutmentsf -17; so that-the ear'ria-gef eoir stantlyftrar'vels 'tOflii l'fio ecrostlieiobniif "ilfntil' lthe igrindin'g of'the "blade "up-en "which the g indingheed is operzitihg is effected? r It ji's :impOftant' that-as the'ijc ai ing- 5 9 moves to and. fro, the griiidi-ng wheel s" iitabl'y" pressed against the knife that is being g ound andthetitflbesupportedendi I have herein repree'ntedthe' ipllewing nieeha} nismw vprev'ide'd" with rel-ls 69., "7 whiehengage the;

Whicghfin: dieciesed jeniboclinient Of the invention idiii'ectly; suppbrt, V and guide 1 the grinding *headfIf desired; h'eii 'ever, the 5.100 said ni-eeheniem'"miiy'he ethe'i wise suppoi te'd a'fidTguide ch 21's heg'einbefof 'fsta'ted *The v 1 e1 I Qh,piessed'outwardly j igtiiist'f {the lreep'ieetive knivee ji by 1 suitable n'i fmsg as;iqi' example, bysprings 71Which 105 arle sliitably L eoi led zibo t ,the'suppe 'tfor the beveled gear 38f1i'penfthe shaft 36' me hes adapted to; enga e a s recket blmi n 59 xtendingtrinsVei'e1y-"0f the flooifii j and 's'e cured altits ends -by"snitab1 eisupperts, one:

Of; Whieh "is indicated 2it 60 extending from the 'l'eoin' frame; 1.; T6 pro't ide* for rigidity in thecha1ii1 'ag suitable tightener 60 -11121? 'simbly; provided" with suitable projectione slag-e111; e? .evidenti*tiieti-thfeugh the de- -f i .Isei'ibed 1 gearing and; coo erating perm-the 73to support the bridge 29, and the several bearings, such as 28, 33, 34, 57 may be integral therewith or they may be secured thereto, suitable caps and fastenings being used therewith as may be required toper mit ready assembling of the parts;

In certain cases, it may be necessary to grind the full length of the knife or knives, and in such case one setot guide rolls Will or may cease to functionbetore the grinding Wheel has completed its necessary travel. To

provide for such contingency, attachments,

such as are shown at 74 in Figs. 1 and 2, may be used to extendthe guiding edges of the knives, such attachment being herein.

shown for the knife l, it being 'ui'iderstood that a similar attachment may be employed for the knife 5.

- l Fig. (3, a slightly modified form of my invention is represe ited it differing only in that there is a greater space between the knives herein indicated at 4-, 5, which are sho vnin full lines, the knives 4t, .5 being indicated in dotted lines. that thesupports for the swinging arms 68 are so located that the same size grinding wheelmay be used as in the narrow form, shown in Fig. 1, and the singularity of the motor or otherwise. In Fig.7 1 have represented a driving mechanism which 1S.

mounted apart from the carriage 9. IIerein I have represented an electric motor 76, which is connected by a flexible shatting 77 with th traveling carriage. The motor 76 is sup? ported in any suitable manner, and for said motor may be substituted any other suitable source or or means for applying power. 7

It" will be evident from-the foregoing description that the grinding mechanism is-it-l self supported by the knife ;or knives to be ground, and the ground surface of the knife or knives acts as a guide for the successive grindings. This latter fi eature isoffimportance because some knives or shears of pile fabric :or likelooms do ,not have a-straight edge, but are eitherconcave or convexion f the edge, so that;the she-a ing operation does not occur simultaneously across *the Whole Width of the fabric as shown for ex-i J ample in said patent to Hughes 1,363,790..

it will be evident that 1 have fprovided for the automaticadjustment of the grindllip; wheel or element against the surface to be ground as well as in the disclosed embodiment of the invention for the automatic transverse of the grinding. element to and fro across the local or other machine carrying a blade or blades. Furthermore the grinding Wheel or element may be adjusted so that It will benoted V and substantially between nee s/s5 any desired angle of shear can be properly employed, they are used'in a generic and descriptive sense and not for purposes of limitation, the scope of the invention be ng set forth in the following claims:

1. An attachmentfor grinding-the op posed knives of a ,moquetteloom When in their open or spaced position upon the loom comprising incombination a carriage constructed and proportioned to be located between and supported'by said knives for travr ei sing movement across the loombetiveen them, a shaft thereon, a rotary grinder upon said shaft ,and adapted to engage a kniie to grind the same,-guiding mcans upon the carriage continuously to effect grinding contact of said grinder With the knife to be ground, and mechanism for rotating said grinder during movement of the carriage.

2. An attachment for grinding the hon- Zontally. spaced shear blades of a moquette loom comprising in coinbinationa carriage constructedmndproportionedfto: be traversable along .and between said spacedv blades said carriage having supporting and guiding means thereon, a grinding member upon said carriage and-adaptedKto act upon a blade to'grindthe same, driving inecha nisin uponsaid carriage and cooperating means supported by the loom along the path. ctrhovement of said carriage, and means for operating said driving mechanismto elfectthe traverse ofsaid carriage. 3. Mechanism for grinding the opposed cooperating knives for, cutting the tuft, yarns of a tut't pile fabr c loom, said knives extending across the loom. and in their open position having their cutting edges spaced a slight distance as compared 1th their length, comprising carriage constructed. and proportioned to .be' located betiveeiiand supported by said knives for traversing movement across the loom in said space between them, a grinding member-upoiisaid carriage ad'aptedfito act upon ftliecut-ting edge" of a knife, means :tor tnaversing'said carriage, and-guiding ineans effective dur V ing; traverse of the carriage to. hold: said .ineniber against the cutting edgegrinding oi the knifewto be ground.

. 4. An apparatus for grinding a; knifebf the opposedHkn-ives for; ciittingflthe yarns of a tuft pile fabric loom, Livlien said" knives are n their- ,opeirpositioir upon the loom, comprising, in conibination a support or frame for thegrinding inembeig saidsupport or. frame being constructed andfproportioned to heynioved ;lo'ng'tudinally of g the vertical planes ofthe open knives, a grinding. member upon said support or frame, adapted 469,655 i i v. 1f

to act the edge of a knifeof "said opposed knives, means'for. effecting to the knife to be ground.

. sl ear'blades of g g V their open or spaced position upon the loom,

taryj grinding member SuppOrtedby said grinding movement of I saidgrinding" 'Inem-r ber, and means constituting a support and" guide for said supporter frame during movement of the latter, for maintaining said grinding member in grinding i relation 5; An apparatus for grindingi the: opposed cutting edges. of the cooperating Ya moquett'efjloom when fin comprising a 'traversable ,carriagef cons'tructed and proportioned tofbeloc'ated tween and supportedjb y said-blades, a r 1;

7 'c arriage in operating positioi i betvveeii'said open blades With 'thejgi inding "face of said member perpendicularitoi the edge of the? 7 blades of a moquette loomjwheiiin their 'p'e :9 a e'e Po ti n "Br n-f t 9 m comprising a carriage constructed aI d'ZprO 'riage and adjustably supported relatively thereto With its axis parallel to the-plane; of the blade to be ground; said shaft being adapted operatively; to support a grinding member in position "betvveenthe blades to blade tobe ground; means for traversing sjaid carriage longitudinally of am on thesheai'f; blades, and guiding means to; cause said grinding 'niember to follow jthe, contour I the blade edge to be ground}:

' ut i geszb "t 'f i op 'e na hee 6.:-An apparatus for grindingithe portioned to be" supported by and between said "blades a' rotatable shaft upon said car grind'the cuttingf'edge 'of' a blade, meansfor follow traversing I said Icarriage longitudinally "of and 1 upon the shear 'b'lade's 'and, guiding nieans' to cause said grinding memberto the contour of the'ijblade edge to be groundi r guiding it for movement" across the 100111 in the "spacebetween the open shearing blades,

- 7. "An ap arent i6 -grinaing th istt;

stantially vertical cuttingQ-edges lof the spaced shearing blades supported upojna moquette loom for relative movement in an' approximately horizontal plane, 'comprising' a carriage having means for supporting and a grinding- Wheel'upon said carriageg means" -to move the carriage; and 'means upon the carriage operative-during movement thereof to' pressjsaid grinding: wheel against said ertical 5 ci tting' edge of the blade 'to' b'e" ground; i I

" 8. Grinding mechanism prisingl a movable carriage' having a siegmentalflb'eairing face, 's'ald" carnage being constructed. and proportioned'to' 'be 'located 7 between ands'upported by. said knivespaf grinder head adjustable upon said face; 1 grinding ,Wheel a rindinfg: shaft therefor.

carried -by said g'rin erheadgfand means 00f for textile ma-' chinery having a pair of spaced knives comwith I j i in n re tio #9 Hell-e ite 1' latter in lbe'groundfi "9. Grinding mechanism chinerylhavinga paifiof coo erating spaced knives ,ooin'prising in ombination, a grinder:

carriage constructed and:proportioned' 'to befl' i supported by'. and betvveenifsaidllknivesfla; rotatablef'grinderi head; supported. thereon j f and having aig'rindenmember, means taro-1 5- carried'by'the-cari tate s'a'id memberrme'ans H riage for traversing" [the latter along the" knife'o'r kniv' es to be ground, guiding means" upon the carriage, andf'l'ne'ans automatically f toreverse direction-ofmoveinent tires 0 a r ag 10,, G r nd ngfmechan 'sm for textileima aving v a knife for kmves l com'pr sa j ry m 1 1 ombi car-i) 1: n e 1 m?! adapted to] act 'u' pn the knife or knives-to be ground, and a' motor; for; efl'eoting', the Q traverse of {said carriage5 said in injgmounted upon the,carriage.v

. 2; G i f dil m c a i m torftei l l a chinery having a} knife or knives fcompris Q p tbh n ex nd ng cngh h Pat:

ent v0f t e in f riage f igf 'spr ck riage. 1

ehinery' having: a knits QrIlmiveS- comprising aetion, and; one or more svviveled arms up'on -sa1 d carriage' having grindingmeans adapt- 'ed to 'englagethe knife org-knives The 125 it:

7 ground; I Gr nd ngmechanism for textile m clnne'ry having a kn fe or [knives co ext-nee m a i a? frame h ving a.' F v sprocket jc'lfi'ain'exten ding ld g h a 'of st 7 saidfcarriagejllefid.

Grinding mechanism": i "F iframe ,ha vingwaz .5

. a rq t im I a. gr ndlngv member, upon said; carr age and. 7 9 1 :f

nism1a.oarf-.-

,u with and iiiovahle al ng1S, d brqcke h p a g r r g me b upon a rria e and; Y-

v the dir'efetionof,moveme1it.of said ear;

t a e-r ble a ri g ding e e 5 1 .9 e gca r ge "f grinding a i 'ia" eblerr e e, 'ei r nd ne meme? i1 5" berfmounted upon saidfe'arrlage' for grind: g

ing action, one or more swiveled arms upon ,saiid carriage having; guiding means adapted in the movement of said carriage, and means" thereon, a grinder wheel upon said shaft and adapted to engage a knife to be ground, a"

swiveled arm 68, guide rolls carried by said swiveled arm and adapted to engage a knife automatically to traverse said carriage along thedm fe or knives'to be ground.

17 Grindingqmechanlsm for textile machinery having a knife orfknives comprisy in i I v thereon," a grinder wheel upon saldshaft and,

"in: combination, a'carriage, a shaft adapted to engage'onejof the knives to. be ground, apair of opposed arms 68'sw1v'eled upon said, carriage and having rolls toengage opposed knives, thereby to guide the carriage end to press the grinder Wheel.

against the knife that is being ground.

18. Grinc'ling'meohanism for textile ma chinery having a pair ofopposed spaced. knives "comprising, a carriage constructed and proportioned to be located between and.

' supported by said knives and having a grinding and'jupon saidknives and.- to reverse the. di rectien' oftravel thereof ncluding] a clutch member, a pa r'of opposed gears having clutch" faces" alternately to engage said. 7 clutch member, andmeansupon the carriage.

' to guide'it inrtsgtravers ng movement.

19. Grinding mechanism for textile. machinery having a' pair of opposed knives,v comprising a carriage constructed and proportioned for movement along and between said knives and having a segmental bearing, ii-grinder head adjustably supported I upon said bearing, a shaft carried by said gi'inderhead, means to rotate the shaft, said shaft being adapted to support a grinder.

disk uponeither end for engagement with opposed knives to be ground, and yielding means to press the active grinder disk. against the knife first being ground.

201 An apparatus}. for grinding the opposed'knives for cutting the tuft yarnsv of a tuft pile fabric loom when in their open p0-' siti'on upon the loom, comprising, in combination, a carriage constructed and proportioned for traversing. movement longitushaft, a grinding, Wheel thereon, and means to traversefsa 'd. carriage along acetates dinally of, and substantially between the vertical planes of the" open knives, a rotary grinding member upon sa'ic carriage adapted to act upon the cutting edgeof a knife, means for effecting rotation ofsaid grindingmember, and means 7 for supporting and guiding said carriage during its traversing movement to maintain said grinding member in grinding relation to the knife to. be ground.

21'. An apparatus for grinding the op.- posed, knives for cutting the tuft yarns of a tuft pile fabric loom when in their open position upon the loom, comprising in CO1 bination, a carriage having a rotary grinding member, said carriage being constructed and proportioned, for traversing movement longitudinally of and with its said grinding member between the open knives in position. to act upon a knife, means for efiecting 35 rotation of said grinding member and means for supporting and guiding said carrlage dur ng its traversing movement to maintain said grinding member in grinding relation, to the knife to be. ground.

22. An apparatus for grindinga knife of the opposed knives for cutting the; tuft yarn of a tuft pilefabric loom, when said knives are. in their open position upon the loom, comprising, in combination, a, sup port or, frame for the grinding member, saidsupport or frame being constructed and proportioned. to be moved longitudinally of and substantially" between the. vertical planes ofthe. open knives, a grinding member upon said, support or frame, adapted to I act upon the cutting edge of a knife of said opposed knives,m'eans for. effecting. grinding movement of, said. grinding member, said support or frame being formed to be itself supported and guided. at. a side portion thereof'up'on a surface of the knife. to be ground, while being moved therealong, whereby said grinding member may be maintained. in its. grindingrelation to the knife to beground.

23. An apparatus for grinding a" knife of the opposed knives for cutting the tuft yarns of a tuft pile fabric looni,.when said knives are in their open position upon the loom comprising, in. comb nation, a' support or frame for the. grinding member, said support or. frame being constructed and proportioned to be moved longitudinally of'and with its-grinding member between the said open knives in position to act upon a knife thereof, a rotary grinding member upon said support or frame adaptedto act upon the cutting edge of aknife. of said. opposed knives, means torotate said grinding. member, said support or frame being formed. to be itself supported and guided at a side portion thereofupon a surface. ofgtheknife-to be ground, while being moved therea1ong,.whereby said grind ing member maybe maintained in its grind-s frame (itself having a, guiding/formation ing relationto the knife to, be ground? thereon whereby it may fetia, ssideflportio'n 1; 24. An. apparatus-for grinding a knife of thereof, berec'eived ;l1P0n and moved along i the opposed knives for cuttingthetuft yarns anexposed surface of 2L knife whose edge 5' L i 5 of a tuft pile fabric 100m; when said knives is'to be gronnd e rotary grindingfimember are in their open position upon theloom, upon said support or frame, and means to comprising, in combination, a support or rotate, saidgrinding member; 1, f frame for the grinding member, said sup In, testimony whereof; I haizesigned my 7 port or frame being constructed andproname topthis specification} 1 10 portionedto be moved longitndinailyl'of and between said spaced blades, said support or Q n F. f

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